[BNAWX] Severe Local Storm Watch and Watch Cancellation

[EMWIN Server]

WWUS20 KWNS 012235
SEL6
SPC WW 012235
TNZ000-020300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 126
NWS STORM PREDICTION CENTER NORMAN OK
635 PM EDT SAT MAY 1 2010

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

       SOUTHERN MIDDLE AND SOUTHEAST TENNESSEE

EFFECTIVE THIS SATURDAY EVENING FROM 635 PM UNTIL 1100 PM EDT.

TORNADOES...HAIL TO 1.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 35 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 90 MILES WEST SOUTHWEST OF
CROSSVILLE TENNESSEE TO 65 MILES EAST SOUTHEAST OF CROSSVILLE
TENNESSEE.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU6).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.

OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 124. WATCH NUMBER 124 WILL NOT BE IN EFFECT AFTER
635 PM EDT. CONTINUE...WW 125...

DISCUSSION...REMNANT MCS WILL CONTINUE TO MOVE EWD ACROSS SRN MIDDLE
AND SERN TN THE NEXT FEW HOURS...FED BY A MOISTURE INFLUX FROM THE S
ATOP AND SLOW-MOVING FRONT NEAR THE SRN TN BORDER.  THOUGH THE
CONVECTION IN THE NRN PART OF THE WATCH MAY REMAIN SLIGHTLY
ELEVATED...THE STORMS ALONG THE IMMEDIATE FRONT/OUTFLOW ACROSS SRN
TN WILL BE ROOTED AT OR VERY NEAR THE SURFACE.  GIVEN THE MOISTURE
INFLUX FROM THE S AND STRENGTH OF VERTICAL SHEAR IN LOCAL VWP/S...A
FEW EMBEDDED ROTATING STORMS AND AN ATTENDANT THREAT FOR A TORNADO
OR TWO WILL PERSIST FOR A FEW MORE HOURS.  DAMAGING WINDS AND LARGE
HAIL SHOULD BE THE MORE COMMON THREATS IN THE WATCH AREA THIS
EVENING.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450. MEAN STORM MOTION VECTOR 26025.


...THOMPSON


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